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No. 770,599. PATEHIED SEPT. 20, 1904 R. 0. MONTEAGLE. HEAT CONDUCTING TUBE.

. APPLICATION FILED Ame. 1903 N0 MODEL.

WITNESSES: m/ VENTOH I b4" L "UNIT STATES ROB RT CHARLES MONTFAGLE; F

Patented September 20, 1904.

NElY YORK, Y., ASSlhNtHi 01 ONE- .HA LF'TO E. MANN 'VYNXE. OF NEiY YORK, N. Y.

HE -coNDucTmG 'uBE.

. SPEGI FICA fiONforming part of LettersBatent No. 770,599, dated September 20, 1904.

Application fil d April e, 1903.

v T 0 all 11 7mm, it mwy'cnncerm Be itknown thatL'Ro'neR r CnAmncs')lox'r- EAGLE, a .c1t1zen of the United States; and a resident of Morr s Heights,in thecity'ot' New 5 York, county and State of New Yin'lc, have. I

invent-ed certain new anda'us fulllmproveinen'tsfin Heat-Conducting the following is a specificat on i,

' My invention-relates tofan improvement in to tubes in ended for-use, in such devices as eva'p-p orators,"condenser's,or similar purposes where p it isdesired' to conduct-- heat between fluids Y which "are respectively w aaa and without- .theltubenl.

r The'ob'ect my invention to reduce a tubeflfor such purposes which 'sha l' have a greater conductive capacity. than an ordinary plaintube and which isals'o' lessliable to'be A furtl er'object of: my 1 processes'whichare commercially practicable. Other ob ects of. my invention will appear from an inspection of the description and cross-section of the tube.

Corresponding parts in all the-figures are denoted by the same reference characters.

The body A oi my improved tuber-(insists 35 of-a series of longitudinal bulged or" convex convolutions B, which are substantially radial in crossscction and. which are coiled 'or pass hchcally about thc'ax is ofuthc tube and are separated from cac;h .,other. by helicallyj-cx 4 tendin, grooves orcdeprcssions concave in cross-section and of a width approximately r equal to the \vidth'of the bulged or convex convolutions. This (effect is prod ucedby first rolling or otherwise forl'ning the tube so asto produce the radial convolutions and then j I The crosssection shown in Fig, 2 gives the appearance twisting -the tube thus formed.

- of the tube before twisting. 'lvhcii the tube t\i-'isted,.thc conrolutions approach nearer 'ubes, of which;

c'ome' l" 'osened by'the variations in temper mature to which it may besubjected;

v ventionis to pro- 'duce a tube of the cliaracter described which may be cheaply and readilymanufactured by.

Serial No.'151,236. No model.)

to each other. than is shown in Fig. 2. A 59 short section C at the ends of the tubes is I left cylindrical in shape to facilitate adjustl mentof the tubes to the heads of boilers or condenscrs. The peculiar-shape of these 0f the liquid in passing through the same,; which insuresintimat-e contact-of the liquid with thejsurfaces of such character -that the conductions of heat through the walls of. the

acter also possesses markedadvantages in otherways The body of the tube possesses a flexibility much greater than any straight tube would possess, and therefore can. give s0. that the strains which variation in temperature tend to produce are compensated forin the body of the tube.v This relieves the point of attachment of the tube in the head from loosen the joint and cause leaks. This fo'rnr of tube is thus speciallywell adapted for use in condensers, as it has a high conducting power and may be kept tight in "the heads.

The material ofthe tube may be anything which it is possible to work into the shape desired. Copper or a ductile material resembling copper isa desirable and preferable material to use in a majority of cases.

It-will be noted that in the improved con- 36 struction of the tube comprised in my inventionthe central bore or main passage is of relatively reduced diameter or area, and a v series of distinct chambers are formed to ex:

tend outwardly and project from said central "5 bore or passage and hclically surround the same, said outer chambers being constituted by a series of helical convolutions surrounding the central passage, which is oi" relatively narrow" or reduced diameter. The helical 9 5 convolutions form the chambers opening into the central passage and a series of deep depressions intcrmediatcly ot' the chambers and projecting inwardly to the-central passagg crably corrcspoml approximately in their i depth and width to the chambers. In the i preferred construction the months or. opentubcs thus termed producesa whirling action 55 tube-is much increased. A tube ot' this char- 6d both by bending and extension or compression. 5]

the strains which with ordinary tubes tend to 7 0 which intermediate helical depressions prct' ings ofthe distinct chambers into the central [passage are of reduced width with relation to the bodyof the chamber.

enhance efliciency inoperation, and the iniprovedfconstruction also provides in a given compass a maximum area of elfectiveand' active operative surface.

" I-do notdesire to be understood aslir'niting myself to the details of construction and ar- -.rangemen't as herein described and illustrated,

- followingclaims.

' as it .is'ma'nifest that variations and modifica tionsmay be 'm'adeL-in the features of construction and arrangement in the adaptation of the device tovarious conditions'of use without departing from the spirit and scope of my'invention and improvements. I therefore reserve the right-,to all such variation and modification as properly-fall within the scope of my invention and 'the terms of the.

that the greater interior'area'of the tube is in Having thus described my invention, I claim .2 and'des'ire to secure by Letters Patentu 1. A heat-conducting tube of the class de-i; scribed havin'ga' central bore or main passage of relatively reduced diameter or area and a- I series of distinct; chambers extending outwardly and projecting from said central bore or passage and 'heli'cally surrounding the same,

said footer chambers. being constituted by a series of-helical convolutions'surrounding the eentralpassage, the'chambers opening into the construction and arrangement being such that the greater interior area of the tube is in a the outer chambers andnot inthe central bore a e a 2.*="A heat-conducting tube of the class,de

of relatively reduced diameteror area and a series of distinct chambers extending :out- .wardly and projecting from said central bore or passage and helically surroundingthe same, said outer chambers being constitilted by a series of helical convolutions-suri'ounding the central passage, the chambers opening into the central passage and a series of deep depressions intermediate of thechambers and projecting inw'ardly'to' the-central passage,- t-hemoy-ths or openings of'said chambers into the central passage being of reduced width witlnrelatidfi to the body of the chamber and the construction and arrangement being'such scribed havinga central bore-or main'passage' 4 or passage. r

In testimony whereof I have signed my name in the presence of the subscribing witnesses.

I A Rotter CHARLES monrt etn.

Witnesses: A

Geo. N.-'CLARK, 1 f' 'ZnuMERrmNN; 

